A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume

D. A. Lowther, R. D. Throne, L. G. Olson, John Robert Windle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this study we examine the effects of tissue inhomogeneities on epicardial estimates when using zero order Tikhonov and first order Tikhonov regularization. Epicardial potentials measured during an in-vivo swine experiment were projected to 96 body surface locations using an inhomogeneous transfer matrix constructed using a finite element model of the swine made from CT scans. It was assumed that the lungs, fat, and remaining volume had conductivities of 50, 40, and 220 μmho/mm. The inverse estimates were then computed from the body surface potentials where noise had been added to simulate measurement errors. The inverses were computed using the same inhomogeneous transfer matrix used for the the forward projection, and with a homogeneous transfer matrix.

Original languageEnglish (US)
Title of host publicationComputers in Cardiology
Pages541-544
Number of pages4
StatePublished - 2001
EventComputer in Cardiology 2001 - Rotterdam, Netherlands
Duration: Sep 23 2001Sep 26 2001

Other

OtherComputer in Cardiology 2001
CountryNetherlands
CityRotterdam
Period9/23/019/26/01

Fingerprint

Computerized tomography
Surface potential
Oils and fats
Measurement errors
Swine
Tissue
Noise
Experiments
Fats
Lung

ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine

Cite this

Lowther, D. A., Throne, R. D., Olson, L. G., & Windle, J. R. (2001). A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume. In Computers in Cardiology (pp. 541-544)

A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume. / Lowther, D. A.; Throne, R. D.; Olson, L. G.; Windle, John Robert.

Computers in Cardiology. 2001. p. 541-544.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lowther, DA, Throne, RD, Olson, LG & Windle, JR 2001, A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume. in Computers in Cardiology. pp. 541-544, Computer in Cardiology 2001, Rotterdam, Netherlands, 9/23/01.
Lowther DA, Throne RD, Olson LG, Windle JR. A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume. In Computers in Cardiology. 2001. p. 541-544
Lowther, D. A. ; Throne, R. D. ; Olson, L. G. ; Windle, John Robert. / A comparison of zero and first order Tikhonov regularization for an inhomogeneous volume. Computers in Cardiology. 2001. pp. 541-544
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